I was a little sceptical on buying a thermostat since I really not sure if it is furnace or thermostat is the problem. I was convince it was the thermostat once the heater came on once then went off and never came on again. Fan worked. After install, furnase, fan, and A/C all comes on so I am fairly sure I replace the right component. This device uses battery and was hoping to find one that do not use battery. It is the one that Prothermostats recommended and I am happy with it. Next time, I might go on my own and get the one without battery back up.

My privious thermostat had a differential of only 1/2 degree. Sure the thermostat maintained a constant temperature, but my heating/ cooling system was consatatly starting and stopping. With this unit I can set the amount of differential between start and stop. Much better !!!

I was a little sceptical on buying a thermostat since I really not sure if it is furnace or thermostat is the problem. I was convince it was the thermostat once the heater came on once then went off and never came on again. Fan worked. After install, furnase, fan, and A/C all comes on so I am fairly sure I replace the right component. This device uses battery and was hoping to find one that do not use battery. It is the one that Prothermostats recommended and I am happy with it. Next time, I might go on my own and get the one without battery back up.

My privious thermostat had a differential of only 1/2 degree. Sure the thermostat maintained a constant temperature, but my heating/ cooling system was consatatly starting and stopping. With this unit I can set the amount of differential between start and stop. Much better !!!